|
例3 Lakeland， Florida， April 29 --- two cars dropped from sight， falling into the bottom of a 30-foot deep sinkhole which appeared suddenly. At a town 13 miles from Lakeland， two bedrooms of one house dropped into a hole 60 feet across and 35 feet deep. Part of the next house hung dangerously over the hole. Sinkholes have been happening without warning in this part for years. So far there is no way to predict （预告） when or where one will appear. But when one does， others usually follow in the same area， usually along a straight line. The worst sinkhole in recent years appeared in 1965. It was 70 feet across and 150 feet deep. I t destroyed one house， damaged several others and broke the walls of a city block. One hole， 15 feet deep， opened up this year in the middle of a highway 19 seconds after a car had driven by. Others in the same area took place at night damaging houses， swallowing（吞没） up trees and parts of streets and making 23 frightened persons run away from their homes in night clothes. Sinkholes happen when the weather is dry. The earth at the surface begins to drop into empty space under the ground， like sand falling in huge hourglass（沙漏） . This is how a sinkhole is formed. When one sinkhole appears， others usually follow _______. A. everywhere B. on a straight highway only C. nearby D. in the places far away 注释： 此题许多学生错选为B.其原因是将原文中（But when one does， others usually follow in the same area， usually along a straight line.）usually along a straight line 与选项B on a straight highway only 等同起来。故正确选项为C，根据是… others usually follow in the same area。 例4 People in the Middle East use a special pot for holding drinking water. This pot allows water to be slowly absorbed （吸收） by the clay （粘土）. As the absorbed water reaches the outer surface of the pot， it evaporates quickly because of the dry air. Because evaporation （蒸发） water absorbs heat from their surroundings， evaporation acts as a cooling process （过程）. This process， in turn， cools the pot. The pot then cools the water held in the pot. Thus， we have an “air-powered cooler”； the clay also absorbs some of the dirt it the water， thus making it taste purer. This type of pot has various shapes in different parts of the Middle East. The “zeer” in Egypt comes to a point at the bottom. Since it does not have a flat bottom， it is usually supported in wooden or metal holder. The water that has reached the surface of the pot runs down the sides of the pot and drips （滴） off the pointed bottom. 1 Where does the zeer work as a water cooler？ A. In East Asia B. In any place in the world C. In places where it is hot and dry D. In places where there is plenty of water 2.Which is the right order for showing how the zeer works as a water cooler？ a. The clay cools b. Water goes through the clay and reaches the outer surface c. The pot cools d. The water cools e. Water evaporates to the air around it f. The evaporating water absorbs the heat around it A. b， e， f， a， c， d B. f， a， b， e， d， c C. b， e， f， a， d， c D. f， a， b， d， c， e 注释 第1小题如选择A就错了，原因是题干中（Where does the zeer work as a water cooler？） work 的含义是“起作用”，因此正确选项为C. 第2小题应注意原文的叙述方式与选项表达的不同，要进行适当的推理才能判断出正确选项（A.） (责任编辑：admin) |